Question

4) If n (A)=2 , n(B)=28 and n(A U B)=36 then n(A ∩ B) = ?​

Answer 1

Answer:

Answer is 6

Step-by-step explanation:

Use formula n(A) +n(B) =n(AUB)+n(AnB)

2+28=36+n(AnB)

n(AnB)=36-30=6

Answer 2

Step-by-step explanation:

We have

n (A) =2 , n ( B) =28 and n (A U B ) =36

Sine , n (A N B ) =n (A ) +n( B ) - n (A U B )

=2 +28 -36

therefore n (A N B ) = -6